Nozzle for oil burners



Dec. 4, 1 928. 1,693,866

c. L. RAYFIELD NOZZLE FOR OIL BURNERS Filed July 20, 1925 Patented Dec. 4, 1928. v

UNITED STATES PATENT OFFECE. H

CHARLES L. RAYFIELD, OF CHICAGO, ILLINOIS, ASSIGNOR TO RAYFIELD MANUFAU- TUBING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

NOZZLE FOR OIL BURNERS.

Application filed July 20, 1925v This invention relates in general to nozzles for oil burners and particularly to mechanical atomization of the oil in systems wherein the oil is supplied to the nozzle under pressure.

It is, therefore, an object ofthis invention to provide an improved atomizing nozzle that will be simple in construction and easily cleaned and adjusted for varying grades of oil andthe varying capacitydemands of the different boilers the burner system may be applied to.

t is also an object of this invention to provide a device of the class descriijied wherein adequate cooling of the nozzle serves to prevent aeeun'mlation of partially coked fuel or carbon which would interfere with the mechanical atomization of the fuel.

Other and further important objects of this invention will be apparent from the disclosures in the specification and the accompanying drawings.

This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a section of the airport forming the orifice for fuel and air admission to a furnace. one form of the oil spraying nozzle of this invention being shown in elevation therein.

Figure 2 is an enlarged section on the line I[-lI of Figure 1 showing the nozzle proper in elevation.

Figure 3 is a top plan View of the nozzle alone.

Figure 4 is a section on the line 1VIV of Fig. 3.

Figure 5 is a section on the line V--V of Figure 4.

As shown on the drawings:

The oil burning system, of which the specific form of nozzle chosen for illustration is a part, utilizes a small amount of compressed air to carry the fuel in suspension along the fuel line 10 to the nozzle structure proper, so that the proportions of the nozzle passages. to he described hereinafter, a re necessarily enlarged because of the accompanyingr air. Smaller nozzle passages would therefore be used for the in ection of fuel alone. The air used to carry the fuel in suspension is inadequate for proper combustion of the oil, so that the necessary air is supplied by a pipe 11 leading to a globe-like casing 12 wherein the outlet 13 to the boiler Serial No, 44.,642.

19 is screwed into the end of the main body 14. and is centrally aperturcd at 20 with a bridge 21 at its inner end to support the stem 22- of an lllVUll't-Li conical needle valve 23 which serves to diverge the oil spray into a flaring or conical sheet. Preferably mounted as a unit with the conical valve 2 is a plus;

24 having a plurality of inclined af sa;1es 25 resembling a helical gear and adapted to give a swirling motion to the oil and air mixture passing therethrough.

Mounted on the valve stem 22 and freely rotatable thereon is a second plug 26 resemblina the plug 24 with similar peripheral passages 27 which may be inclined in either direction with respectto the passages 25. The plug 26 is rapidly rotated by the. force of the flowing fuel and air mixture and serves to break up the globules of oil carried by the air stream. thus materially assist.- ing in atomizing the oil, especially the heavier grades of oil which will not vaporize without the application of an excessive. amount of heat.

The valve stem 22 is adjustably n'iounted in the bridge 21, a lock nut 28 being provided. In practice this valve may be assembled without tightening the loclznut 28 and then initially adji'ist'cd without removing: the nozzle body 19 from the main body 1. L and then the adjustment may be che lredyby a trial run. W hen correctly adjusted the nozzle body ma y be removed to tighten the lock nut 28. This adjustment is provided both to carefor varying;- types of fuel and the varying heating requirements of different boiler installations.

I am aware that many changes may he made and numerous details of construction may be varied through a wide range without departingfrom the principles of this in vention, and I therefore do not purpose limitr ing the patentgranted hereon, otherwise than necessitated by the prior art.

I claim as my invention:

1. A mechanical atomizin oil nozzle tor oil burners comprising a centrally'passaged body having a bridge at the inner end thereof, a valve stem adjustably depending from said bridge, a plug fitting the body passage and carried by said valve stem, said plug having a plurality of inclined passages therein, an inverted conical valve forming a continuation of said plug and valve stem said conical valve coacting with the body passage to form a valve and its seat, and a second plug similar to said first plug freely journalled on said valve stem adjacent said first plum 2. In combination, in a nozzle of the class described, a nozzle body having a passageway through which liquid is discharged, a rotatable member positioned in said passageway provided with means for breaking up the liquid into drops and globules, and a fixed member positioned between said rotary member and the discharge end of said body passageway provided with means for giving the liquid a swirling motion.

In combination, in a nozzle of the class described, a nozzle body having a )assageway, a rotatable member in said passageway provided with means for breaking up the liquid into drops and globules, a deflecting clement positioned at the discharge end of said passageway provided with means for deflecting the liquid laterally from said passageway, and a fixed member between said rotary member and said deflecting element provided with means for imparting a swirling motion to the liquid prior to it being discharged i'ro n the passageway.

i. In combination, in a nozzle of the class described, a nozzle body having a passageway through which liquid is discharged, a rotatable member positioned in said passage way provided with means for breaking up the liquid into drops and globules, and a member positioned between said rotary memher and the discharge end of said body passageway for giving the liquid a swirling mo tion, each of said members being provided with spiral grooves through which the liquid must pass.

5. In combination in a'nozzle of the class described, a nozzle body having a passageway, a rotatable member in said passageway provided with means for breaking up the liquid into drops and globules, a dellecting element positioned at the discharge end of said passageway provided with means for cleilecting the liquid laterally from said passageway, and a member between said rotary n'iclnber and said deflecting element provided with means for imparting a swirling motion to the liquid prior to it being discharged from the passageway, said deflecting element comprising a conical valve plug having its smallest end extending into the discharge end of said passageway.

6. In C(JIl'lblDtlilOIl, in a nozzle of the class described, a nozzle body having a passageway, a rotatable member in said passageway provided with means for breaking up the liquid into drops and globules, a deflecting element positioned at the discharge end of said passageway provided with means for deflecting the liquid laterally from said passageway, a member between said rotary member and said deflecting element provided with means for imparting a swirling motion to the liquid prior to it being discharged from the passageway, said deflecting elementcomprising a conical valve plug having its smallest end extending into the discharge end of said passageway, and means for adjusting the dcflecting valve plug so as to vary itsposition relative to said end oil? the passageway.

7. In combination in a nozzle of the class described, a nozzle body having a passage way, a rotatable member in said passageway provided with means for breaking up the liquid into drops and globules, a deflecting clement positioned at the discharge end of i said passageway provided with means for deflecting the liquid laterally from said passageway, and a member between said rotary member and said deflecting element provided with means for imparting a swirling motion to the liquid prior to it being discharged from the passageway, said deflecting clement comprising a valve including a conical head p0- sitioned at the discharge end oi said passageway and a stem extending into said passageway and through said fixed and rotary me1nbers.

8.v In combination in a nozzle of the class described, a nozzle body having a passageway, a rotatable member in said passageway provided with means for breaking up the liquid into drops and globules,a deflecting element positioned at the discharge end of said passageway provided with means for deflecting the liquid laterally from said passageway, a fixed member between said rotary.

member and said deflecting element for imparting a swirling motion to the liquid prior to it being discharged from the passageway,

said deflecting element comprising a valve including a conical head positioned at the discharge end of said. passageway and a stem extending into said passageway and through said lined and rotary members, and means for adj ustably connecting said valve stem to said body. In testimony whereof I have hereunto subscribed my name.

CHARLES L. RAYFIELD. 

